Datasheet - Test Equipment Depot
Contents
1. 3 9 6 3 PARALLEL OPERATION 1 When a current capacity larger than a single unit is required a couple of the units may be used in a parallel connection In a parallel operation a unit becomes the main unit and other becomes the sub unit Setting of the voltage and current should be made of the main unit 2 Connection Make the connection while the power off GND Fig 6 4 For parallel operatio make the connection in the sequence of the terminal of the main unit terminal of the sub unit terminal of the main unit and terminal of the sub unit Then connect the wires between the Parallel terminal main unit and the Parallel terminal sub unit Use thick wires for all the connections a Tum the voltage knob 5 4 and the current knob 3 of the sub unit full clockwise b The voltage and current are variable by the main unit The output current limit can be selected within a range of about 10 to 100 of the double of the maximum rating current In this case as the load current increase the ampere meters of both main and sub units swing and the load current is indicated as the sum of both amperemeters NOTES Other type of regulated DC Power supply can be connected for parallel operation The maximum number of units for parallel operation is limited to 2 units 7 NOTES ON ENVIRONMENTAL CONDITION 7 1 Avoid using the unit in such a place where the ambient temperature exceeds 40 C2. clean If the panel is heavily stained rub the affected area lighty with a soft cloth soaked in light neutral detergent or alcohol 3 Never use highly volatile material such as benzene or paint thinner 5 4 SPECIFICATIONS Output polarity Positive amp Negative Ripple Voltage Less than 2mVp p inesRequiation Less than 0 01 2mvV for power source voltage 9 change of 10 Load Regulation Less than 0 01 3mV for load variation of 0 to 100 Voltmeter Accuracy 1 1digit 2 5 FS 1 1digit 2 5 FS Ampermete Accuracy ut between More than 10 at DC 500V chassis and output terminal More than 50 at DC 500V chassis and AC plug Compensation Ovenoad protection circuit of constant current Protection circuit self restoring type Ambient temperature 5 C 40 C Operating Humidity 50 80 Weight Approx 4 5Kg Short circuit Bar Manual Fuse Power Consumption 130VA 130VA 6 5 DECRIPTION OF PANEL FUNCTION 5 1 Front Panel Description b GG gu aa a303a CV CURRENT FINE VOLTAGE CURRENT FINE VOLTAGE O 0 POWER POWER e Ome e Om a e Wi WZ 0 p D p Analog Type Digital Type 1 POWER SWITCH This switch tums on and off the power 2 CURRENT METER Indicates the load curent 3 VOLTAGE METER Set an output voltage while reading the voltage indication 4 C C LED Display LED for overcurrent 5 C V LED Display LED for static s
3. the instrument make sure the line voltage selector switch is set correctly In the case of the line voltage selector switch selected must be operated to the correct line fuse To change the line voltage selection 1 Make sure the instrument is disconnected from the power source 2 Pull out the line voltage selector switch on the bottom panel Select the arrow mark position of the switch from Table 3 1 Select the arrow mark to the desired position and plug it in 3 Pull out the line fuse holder containing the fuse for overload protection Replace the fuse in the holder with the correct fuse from table3 1 amp plug it in Table 3 1 Line voltage Selection amp Fuse Ratings Fuse Ratings 250V PR cia canoe wien ee tangs E ___GP 4303D A GP 4185D A AC 90 110 AC 108 132 115V T3 15A AC 207 250 230V T1 6A For continued protection against fire replace the line fuse only with a fuse of the specified type and rating 3 2 INSTALLATION amp HANDLING PRECAUTIONS When placing the power supply in service at your workplace observe the following precautions for best instrument performance and longest service life 1 Avoid placing this instrument in an extremely hot and cold place Specifically don t leave this instrument in a close car exposed to sunlight in midsummer or next to a space heater 4 5 Don t use this instrument immediately after bring it in from the cold Allow time for it to wa
4. to protect the device from the over current To set the current connect the and terminala by a thick lead wire Slowly tum the current adjustment knob 3 and set the current while watching the amperemeter indication At this time set the voltage adjustment knob 5 full counter clockwise and set the white mark of the FINE adjustment knob 4 at middle The minimum current that can be set is as follows GP 4303D A Approx 200mA 3A GP 4185D A Approx 350mA 5A After setting a limiting current remove the short circuit wire Then set the voltage to a required voltage level 5 After completing the above procedure watch the polarity of a device to be applied and use the instrument If the voltmeter indication becomes less than the sset level for a defect of a device to be tested or for any other reason the overcurrent protection circuit is activated resulting in switching into the constant current operation from the constant voltage operation When the instrument is to be used in the constant voltage operating condition set the Current adjustment knob full clockwise In this case the short circuit current is 3A 10 for the GP 503 5A 10 for the GP 305 505 and 10A 5 for the GP 3010 8 6 2 SERIES OPERATION 1 By connecting a couple of the units in series a higher voltage than a single unit is available In such a case no terminal should be applied with a voltage more than the rating voltage against the g
5. Test Eguipment 99 Washington Street Depot Melrose MA 02176 Fax 781 665 0780 1 800 517 8431 TestEquipmentDepot com GP 4303D GP 4303A GP 4185D GP 4185A Operation manual WER SUPPLY GP 4303A CURRENT FINE VOLTAGE D N a POWER 6090 EZ Digital Co Ltd INSTRUCTIONS Thank you for purchasing EZ DIGITAL products The instruments produced by EZ DIGITAL are high products technplogy products made under strict quality control We guarantee their exceptional precision and utmost reliability For proper use of this product please read this manual carefully EZ Digital Co Ltd 1 To maintain the precision and the reliability of the product use it in the standard setting Operating temperature 5 C 40 C Operating humidity 80 50 Storage temperature O C 70 C Storage Humidity less than 85 2 For quality improvement the exterior design and specifications of the product can be changed without notice 3 Should any further information be required please contact the EZ DIGITAL company or sales outlet WARRANTY Warranty service covers one year the date of original purchase In case of technical failure a year repair service will be provided by EZ DIGITAL company We charge for repairs after the one year warranty period expires When the failure is a result of user s neglect natural disaster or accident we charge for repaires regardless of the warranty period For more professiona
6. l repair service be sure to contact us or sales outlet 1 1 INTRODUCTION GP 4303A D 4185A D series are regulated DC POWER SULLPY units with voltmeter and amperemeter GP 4303A D can supply the DC power of 0 to 30V 3A GP 4185A D can supply 0 to 18V 5A A means Analog meter D means Digital meter They are provided with continuously variable coarse adjustment and the output voltages and with continuously variable current adjustment in a range of 10 to 100 Current limiting and overload protection functions are built in to protect the over current The supply features anloge voltmeter and amperemeter enabling the user to monitor the supply s operation at a glance LEDs for Constant current C C and Constant Voltage C V enables monitoring of operation status Main input voltage AC115 or 230V selectable and 50 60Hz are supported 2 FEATURE Built in output current limit circuit Overload Protection Availability of series and or parallel operation Constant Current and Constant Voltage Low Ripple Remote Control Operation Analog Control Option Built in Analog Voltage meter and Amperemeter 3 3 PRECAUTIONS 3 1 Line voltage selection This instrument must be operated with the correct line voltage selector switch setting and the correct line fuse for the line voltage selected to prevent damage The instrument operates from either a 90V to 132V or 198V to 250V line source Before line voltage is applied to
7. or under the direct sum shines Limit the maximum output current when the unit is used in such a place where ventilation is interrupted or a radiation exists other equipments 7 2 Use the instrument whitin 10 tolerance of the specified from the power source 10 8 CURRENT LIMITING CIRCUIT When the output teminals are short circuited by mistake the current limiting circuit is activated to limit the flow of the current in excess of the rating output current so that the control elements and the amperemeters connected in series operation an be protected from the sudden damage The output limit current caan be set in a range from 10 to 100 of the rating current and when the output current reaches the set value the instrument operates in the constant current condition As the output current comes down below the set value the constant voltage condition is automatically resumed 9 TO REPLACE THE FUSE Pull out F1 below with screw driver and get rid of F1 take out spare Fuse in the holder Put it in the position of F1 Tum off the power sw and remove the power cord change the abnormal fuse i Fuse F1 J 1 SPARE FUSE 11
8. rm to room temperature Similary don t move it from a warm place to a very cold place as condensation might impair its operation Do not expose the instrument to wet or dusty enviroments Do not place liquid filled containers on top of this instrument A spill could seriously damage the instrument Do not use this instrument where it is subject to serve viration or strong blows 6 Do not place heavery objects on the case or otherwise block the ventilation holes 7 8 9 10 11 12 13 14 15 16 Do not use this power supply in strong magnetic fields such as near motors Do not insert wires tools etc through the ventilation holes Do not leave a hot soldering iron near the instrument Do not place this instrument face down on the ground or damage to the knobs may resuit Do not connect other power source to of the output terminal Ground terminal of power code must connect to the ground According to output porarity it solved problem ESD and Floating voltage using the connect ground port to terminal of output To connect the ground be careful at ground porarity of load Input voltage of instrument must be equal to AC power voltage It use to thick and short wire of output terminal in possible 3 3 CLEARING 1 To clean stained casing lightly rub the stained area with a soft cloth dipped in a neutral detergent 2 If the surface of the panel is dirty use the same method to
9. round potential between a terminal and panel chassis The rating voltage against the ground is 100V With a series operation of couple of the units a double of the rating voltage of a single unit and current of a single units is available When two unit either GP 4303A D are used the maximum voltage available 60V or 60V When two unit either GP 4185A D are used the maximum voltage available 36V or 36V NOTE 1 The overcurrent protection is effective at the smaller value of the two 2 Series operation between other types is not available 2 Notes on series operation When the series connected two units of regulated DC power supplies are overloaded the unit in which the overcurrent protection circuit activated first is applied with the reverse voltage from the output of the unit and so the series control element of the former will be damaged To protect this problem connect two diodes between the output terminals of the units as shown in Fig 6 2 Diodes to be used should be wiwth a high voltageee than the maximum rating voltage of a single unit and the voltage rating of sioses should be 2 to 3 times of the maximum voltage of the series connection Pere eee reer yy 3 Connection GND _GND Fig 6 3 a For the negative grounding As shown by a solid line fig 6 3 b For the positive grouding As shown by a dotted line fig 6 3 Do not connect the GND terminal to different polarities other than fig 6
10. tate curent amp voltage operating 6 CURRENT VR The current limiting knob for setting and adjusting the output current in a range of max 10 100 7 FINE VR The fine adjustment knob of the output voltage 8 COARSE VR The coarse adjustment knob of the output voltage 9 OUTPUT TERMINAL The negative side of output terminal 10 OUTPUT TERMINAL GND When the positive polarity or negative polarity is to be connected to the ground either an appropriate output teminal should be connected to the GND by a short circuit bar supplied as accessory When no bar connection is made the teminal is used as the ground terminal 11 OUTPUT TERMINAL The positive side of output terminal 7 6 OPERATIONS 6 1 INDEPENDENT OPERATION 1 The terminal or the terminal is to be connected always to the GND Terminal GND with short circuit bar as an accessory should be connected as shown in Fig6 1 When positive output polarity is required SHORT CIRCUIT BAR Fig 6 1 2 Connect the AC Power cord to the power source of the specified voltage and tum on the power switch 3 To set the load voltage slowly tum the voltage adjusting knob 5 caorse clockwise with no load while watching the amperemeter The knob 5 is for coarse adjustment and the knob 4 is for fine adjustment 4 Load current setting is used for limiting the current applied to a device to be tested at a specified power or
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